4.18-stable review patch. If anyone has any objections, please let me know.
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From: Haishuang Yan yanhaishuang@cmss.chinamobile.com
[ Upstream commit 5a64506b5c2c3cdb29d817723205330378075448 ]
If erspan tunnel hasn't been established, we'd better send icmp port unreachable message after receive erspan packets.
Fixes: 84e54fe0a5ea ("gre: introduce native tunnel support for ERSPAN") Cc: William Tu u9012063@gmail.com Signed-off-by: Haishuang Yan yanhaishuang@cmss.chinamobile.com Acked-by: William Tu u9012063@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ipv4/ip_gre.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -331,6 +331,8 @@ static int erspan_rcv(struct sk_buff *sk ip_tunnel_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error); return PACKET_RCVD; } + return PACKET_REJECT; + drop: kfree_skb(skb); return PACKET_RCVD;